.layui-nav-item-clicked {
  color: blue;
}
/* 二级目录的底部颜色 */
.layui-nav-tree .layui-nav-child dd.layui-this, .layui-nav-tree .layui-nav-child dd.layui-this a, .layui-nav-tree .layui-this, .layui-nav-tree .layui-this>a, .layui-nav-tree .layui-this>a:hover {
    background-color: #55aaff;
    color: #fff;
}

/* 用户名底部颜色 */
.layui-nav .layui-this:after, .layui-nav-bar, .layui-nav-tree .layui-nav-itemed:after {
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 5px;
    background-color: #55aaff;
    transition: all .2s;
    -webkit-transition: all .2s;
}